Adding Travis CI

Author: Ryan Lohan

.pre-commit-config.yaml

@@ -15,3 +15,4 @@ repos:
     - --indent=2
     - --no-sort-keys
   - id: check-merge-conflict
+  - id: check-yaml

.travis.yml

@@ -0,0 +1,19 @@
+language: java
+dist: bionic
+jdk: openjdk11
+env:
+  global:
+    - PYENV_VERSION=3.7
+    - AWS_REGION="us-east-1"
+    - AWS_DEFAULT_REGION=$AWS_REGION
+install:
+  - pip3 install --user pre-commit
+script:
+  - pre-commit run --all-files --verbose
+  - cd "$TRAVIS_BUILD_DIR/"
+  # from Maven 3.6.1+, should use `--no-transfer-progress` instead of Slf4jMavenTransferListener
+  - >
+    mvn
+    -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=warn
+    -B
+    clean verify